Patents by Inventor Grant E. Spangler

Grant E. Spangler has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Avoiding type A luder lines in forming sheet made of an Al-Mg alloy
    Patent number: 4081294
    Abstract: Improved alloy compositions for making sheet products, and related method aspects, based on adding zinc to Al-Mg alloys in an amount effective to avoid Type A Luder lines when cold working such sheet in annealed condition.
    Type: Grant
    Filed: May 26, 1976
    Date of Patent: March 28, 1978
    Assignee: Reynolds Metals Company
    Inventors: David S. Thompson, John S. Prestley, Jr., Grant E. Spangler